1217861125012 has 48 divisors (see below), whose sum is σ = 2564034605440. Its totient is φ = 494447473152.

The previous prime is 1217861125009. The next prime is 1217861125037. The reversal of 1217861125012 is 2105211687121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16805368 + ... + 16877680.

Almost surely, 2^{1217861125012} is an apocalyptic number.

It is an amenable number.

1217861125012 is an abundant number, since it is smaller than the sum of its proper divisors (1346173480428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1217861125012 is a wasteful number, since it uses less digits than its factorization.

1217861125012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104000 (or 103998 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 37.

The spelling of 1217861125012 in words is "one trillion, two hundred seventeen billion, eight hundred sixty-one million, one hundred twenty-five thousand, twelve".